Municipal Separate Stormwater Sewer Systems (MS4s)

Contacts
Statutory sections
Rules
Forms
General permit
MS4 Documents
Supplemental materials

Related page: Waste Discharge Program

For Public Comment: Notice of Intent to Comply with MS4 General Permit

The MS4 general permits describe permit coverage and limitations, definitions, authorization and notice requirements, stormwater program management plan requirements, and standard conditions for municipalities, transportation MS4s and state federally-owned MS4s.

Contact

Statutory sections

  • Waste discharge laws. 38 MRSA § § 413, et. seq. (off-site).
  • Water classification laws. See the Classification page.

Rules

  • General Permits for Certain Wastewater Discharges, Ch. 529, (off-site).
  • See also the Waste Discharge Program Page.
  • Note: links are to on-line rules maintained by Maine's Secretary of State's Office. Files are in msword and sometimes take a little while to load.

Forms

General permits

The three MS4 general permits are effective July 1, 2013.

  1. Small Municipal. General Permit for the Discharge of Stormwater From Small Municipal Separate Storm Sewer Systems
  2. Transportation. General Permit for the Discharge of Stormwater From Maine Department of Transportation and Maine Turnpike Authority Municipal Separate Storm Sewer System Facilities
  3. State or federal. General Permit for the Discharge of Stormwater From State or Federally Owned Municipal Separate Storm Sewer System Facilities

MS4 Documents

Supplemental materials

To obtain hard copies of the materials listed above, call your nearest DEP regional office, or email.